newlib/libc/argz/envz_add.c

   1 /* Copyright (C) 2002 by  Red Hat, Incorporated. All rights reserved.
   2  *
   3  * Permission to use, copy, modify, and distribute this software
   4  * is freely granted, provided that this notice is preserved.
   5  */
   6
   7 #include <errno.h>
   8 #include <sys/types.h>
   9 #include <string.h>
  10 #include <stdlib.h>
  11 #include <argz.h>
  12 #include <envz.h>
  13
  14 error_t
  15 envz_add (char **envz,
  16        size_t *envz_len,
  17        const char *name,
  18        const char *value)
  19 {
  20   char *concat = NULL;
  21   int name_len = 0;
  22   int val_len = 0;
  23   int retval = 0;
  24
  25   envz_remove(envz, envz_len, name);
  26
  27   if (value)
  28     {
  29       name_len = strlen(name);
  30       val_len = strlen(value);
  31       if(!(concat = (char *) malloc(name_len + val_len + 2)))
  32         return ENOMEM;
  33
  34       memcpy(concat, name, name_len);
  35       concat[name_len] = '=';
  36       memcpy(concat + name_len + 1, value, val_len + 1);
  37
  38       retval = argz_add(envz, envz_len, concat);
  39       free(concat);
  40     }
  41   else
  42     {
  43       retval = argz_add(envz, envz_len, name);
  44     }
  45   return retval;
  46 }